Red-legged Kittiwake (Rissa brevirostris), a species in the genus Rissa
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Black-legged Kittiwake (Rissa tridactyla), a species in the genus Rissa
Excessive fishing of sand eels on an industrial scale in the North Sea has been linked to a decline in the breeding success of kittiwakes, terns, fulmars and shags.
Sandeels are an important food source for seabirds, including puffins and kittiwakes.